Quarter	US dollars
2004-12-31	10961
2005-03-31	14076
2005-06-30	10791
2005-09-30	13340
2005-12-31	9946
2006-03-31	14219
2006-06-30	11555
2006-09-30	12211
2006-12-31	13918
2007-03-31	17420
2007-06-30	15064
2007-09-30	15099
2007-12-31	12879
2008-03-31	15240
2008-06-30	15877
2008-09-30	13045
2008-12-31	12468
2009-03-31	8086
2009-06-30	7248
2009-09-30	6923
2009-12-31	5624
2010-03-31	7377
2010-06-30	8648
2010-09-30	9981
2010-12-31	6257
2011-03-31	7486
2011-06-30	7249
2011-09-30	9139
2011-12-31	6552
2012-03-31	7019
2012-06-30	8437
2012-09-30	7587
2012-12-31	7649
2013-03-31	7316
2013-06-30	8224
2013-09-30	8137
2013-12-31	7410
2014-03-31	7501
2014-06-30	8331
2014-09-30	6760
2014-12-31	6677
2015-03-31	5577
2015-06-30	6159
2015-09-30	5192
2015-12-31	6064
2016-03-31	5804
2016-06-30	6009
2016-09-30	6345
2016-12-31	4743
2017-03-31	6163
2017-06-30	6599
2017-09-30	7742
2017-12-31	5966
2018-03-31	8929
2018-06-30	7262
2018-09-30	5150
2018-12-31	4548
2019-03-31	4809
2019-06-30	6325
2019-09-30	5926
2019-12-31	4999
2020-03-31	5939
2020-06-30	6035
2020-09-30	5392
2020-12-31	5477
2021-03-31	7047
2021-06-30	7173
2021-09-30	7126
2021-12-31	5469
2022-03-31	6905
2022-06-30	7465
2022-09-30	6589
2022-12-31	5706
2023-03-31	6681
2023-06-30	5613
2023-09-30	6662